Which to use
“plug” and “plugin” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #5,726
- “plug” frequency rank
- #20,183
- “plugin” frequency rank
- 25909
- confusion score
Side-by-Side Comparison
| Feature | plug | plugin |
|---|---|---|
| Definition | A pronged connecting device which fits into a mating socket, especially an electrical one. | Alternative spelling of plug-in. |
Where the eye mixes plug and plugin
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Look-alike desk: plug vs plugin
A purely visual mix-up. plug (/plʌɡ/) and plugin (/ˈplʌɡ.ɪn/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “plug” sits inside “plugin”. Our composite confusion score for this pair is 25909, derived from the frequency rank of both members and their visual similarity.
plug is recorded at frequency rank #5,726, classified as anoun, pronounced /plʌɡ/. plugin is at rank #20,183, tagged as anoun, pronounced /ˈplʌɡ.ɪn/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 25909, this pair ranks #390,721 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of plug vs plugin
Shared letters: glpu. Private to "plug": -. Private to "plugin": in.
"plug" · 4 letters · shape CCVC · "plugin" · 6 letters · shape CCVCVC
Known mistypes of this pair
Frequently Asked Questions
Can "plug" and "plugin" be used interchangeably?
Frequency check: "plug" vs "plugin" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "plug" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "plugin" - compare definitions side by side with the headword page. Word entry
- This pair ranks #390,721 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "plug" and "plugin" also get mixed up with nearby pairs, the highest-scored neighbour is "plop vs plug". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #390,721 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.